Patents by Inventor Takayuki Nitta

Takayuki Nitta has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230238911
    Abstract: A motor control system includes a three-phase motor winding; and a thermistor that measures a temperature of any one or two of coils of the three-phase motor winding, the motor control system including a coil temperature estimation unit that calculates an estimated temperature of each of the three-phase coils based on a value of a current flowing through the three-phase motor winding. The motor is controlled based on the estimated temperature of the three-phase motor winding when a difference between the estimated temperatures of the three-phase motor winding is larger than a predetermined value. The motor is controlled based on a measured value of the thermistor when the difference between the estimated temperatures of the three-phase motor winding is equal to or less than the predetermined value.
    Type: Application
    Filed: June 10, 2021
    Publication date: July 27, 2023
    Applicant: Hitachi Astemo, Ltd.
    Inventors: Yuji KOBAYASHI, Yasuyuki SAITO, Takayuki NITTA, Yoshinori AOSHIMA, Hiroyuki TAKEMOTO
  • Patent number: 11437876
    Abstract: The present invention provides a rotating electrical machine capable of fixing a permanent magnet at a defined position of a magnet insertion hole without providing a filling groove for injection of a filler in a rotor core and, of course, without lowering performance as the rotating electric machine. A rotating electrical machine of the present invention includes: a rotor; and a stator, the rotor including: a rotor core provided with a plurality of magnet insertion holes; a permanent magnet inserted into the magnet insertion hole; and a filler configured to fix the permanent magnet to the magnet insertion hole.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: September 6, 2022
    Assignees: HONDA MOTOR CO., LTD., HITACHI ASTEMO, LTD.
    Inventors: Takayuki Nitta, Yasuyuki Saito, Yuji Kobayashi, Manabu Yazaki, Keiichiro Kashiwabara, Atsushi Nishida
  • Publication number: 20200119602
    Abstract: The present invention provides a rotating electrical machine capable of fixing a permanent magnet at a defined position of a magnet insertion hole without providing a filling groove for injection of a filler in a rotor core and, of course, without lowering performance as the rotating electric machine. A rotating electrical machine of the present invention includes: a rotor; and a stator, the rotor including: a rotor core provided with a plurality of magnet insertion holes; a permanent magnet inserted into the magnet insertion hole; and a filler configured to fix the permanent magnet to the magnet insertion hole.
    Type: Application
    Filed: June 27, 2018
    Publication date: April 16, 2020
    Inventors: Takayuki NITTA, Yasuyuki SAITO, Yuji KOBAYASHI, Manabu YAZAKI, Keiichiro WABARA, Atsushi NISHIDA
  • Patent number: 8566995
    Abstract: Provided is an endoscopic duct cleaning tool which uses elastic porous members to prevent the inside of a duct of an endoscope from being damaged, and which can firmly fix the elastic porous members to a core wire and secure a sufficient thickness in each of the elastic porous members. This endoscopic duct cleaning tool 1 is inserted into a duct 53 of an endoscope 50 to clean the duct 53. The endoscopic duct device 1 includes a core wire 10 consisting of a stranded wire, plural cylindrical elastic porous members 20 disposed at certain intervals and at certain places in an axial direction of the core wire 10 so as to cover an outer circumference of the core wire 10 directly, and resin tubes 30 covering outer circumferences of portions of the core wire 10 which are not covered with the elastic porous members 20. An outer diameter of each of the resin tubes 30 is formed to be larger than an inner diameter of each of the elastic porous members 20.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: October 29, 2013
    Assignee: Piolax Medical Devices, Inc.
    Inventors: Hiroyuki Asano, Yasuo Yoshikawa, Yasuhiro Hoshino, Hirokazu Higuchi, Takayuki Nitta
  • Publication number: 20110289705
    Abstract: Provided is an endoscopic duct cleaning tool which uses elastic porous members to prevent the inside of a duct of an endoscope from being damaged, and which can firmly fix the elastic porous members to a core wire and secure a sufficient thickness in each of the elastic porous members. This endoscopic duct cleaning tool 1 is inserted into a duct 53 of an endoscope 50 to clean the duct 53. The endoscopic duct device 1 includes a core wire 10 consisting of a stranded wire, plural cylindrical elastic porous members 20 disposed at certain intervals and at certain places in an axial direction of the core wire 10 so as to cover an outer circumference of the core wire 10 directly, and resin tubes 30 covering outer circumferences of portions of the core wire 10 which are not covered with the elastic porous members 20. An outer diameter of each of the resin tubes 30 is formed to be larger than an inner diameter of each of the elastic porous members 20.
    Type: Application
    Filed: February 12, 2010
    Publication date: December 1, 2011
    Inventors: Hiroyuki Asano, Yasuo Yoshikawa, Yasuhiro Hoshino, Hirokazu Higuchi, Takayuki Nitta
  • Publication number: 20080132759
    Abstract: A cap attachment with excising function attached to the tip of an insert part of an endoscope inserted into the body the cap attachment comprising a cylindrically shaped body part 2 and a plate-shaped excising part projecting from the tip of the body part 2 in the axial direction, and the excising part 4 comprising a tip electrode 6 extending the width direction at the tip thereof. According to this cap attachment with excising function 1, excising operation on organic tissues can be performed easily and accurately.
    Type: Application
    Filed: December 15, 2005
    Publication date: June 5, 2008
    Applicant: KYOTO UNIVERSITY
    Inventors: Shin' ichi Miyamoto, Takayuki Nitta